Light emitting diode package and method of manufacturing the same

ABSTRACT

Disclosed herein are a light emitting diode package and a method of manufacturing the same. The light emitting diode package includes: a substrate, a light-emitting layer disposed on a surface of the substrate and including a first type semiconductor layer, an active layer, and a second type semiconductor layer, a first bump disposed on the first type semiconductor layer and a second bump disposed the second type semiconductor layer, a protective layer covering at least the light-emitting layer, and a first bump pad and a second bump pad disposed on the protective layer and connected to the first bump and the second bump, respectively.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a Continuation of U.S. patent application Ser. No.13/425,156, filed on Mar. 20, 2012, which claims priority from and thebenefit of U.S. Provisional Patent Application No. 61/466,229, filed onMar. 22, 2011, U.S. Provisional Patent Application No. 61/505,107, filedon Jul. 6, 2011, and U.S. Provisional Patent Application No. 61/552,618,filed on Oct. 28, 2011, which are all hereby incorporated by referencefor all purposes as if fully set forth herein.

BACKGROUND OF THE INVENTION Field of the Invention

Exemplary embodiments of the present invention relate to a lightemitting diode package and a method of manufacturing the same.

Discussion of the Background

A light emitting diode is basically a PN junction diode having ajunction of a p-type semiconductor and an N-type semiconductor.

In the light emitting diode, when the P-type semiconductor junctionswith the N-type semiconductor, and then, is applied with voltage so asto be supplied with current, holes of the P-type semiconductor movetoward the N-type semiconductor while electrons of the N-typesemiconductor move toward the P-type semiconductor, thereby moving theelectrons and the holes toward the PN junction part.

The electrons moving toward the PN junction part are coupled with theholes. The electrons move from a conduction band to a valence band. Inthis case, energy corresponding to a height difference between theconduction band and the valence band, that is, the energy difference isemitted. The energy is emitted in a form of light.

Generally, the light emitting diode package is manufactured by using agrowth substrate, which forms light emitting chips in which lightemitting diodes are formed on a surface of the growth substrate, andpackaging the light emitting diode chips. For example, whenmanufacturing a flip chip-type light emitting diode package, a lightemitting flip chip-type light emitting diode package is manufactured bya process of forming the light emitting chips in which the lightemitting diodes are formed on the growth substrate, mounting the lightemitting diode chips on a submount, or the like, and packaging the flipchips mounted on the submount.

Therefore, since the light emitting diode package according to therelated art involves a process of manufacturing the light emitting diodechips and a process of packaging the light emitting diode chips, theprocess is complicated, and thus, may have a potential risk of defectsand raise the manufacturing costs.

Further, since the light emitting diode package according to the relatedart is manufactured by manufacturing the light emitting chips on thegrowth substrate and mounting and packaging the chips on the submount,or the like, the size of the light emitting diode package is increased,such that there is a limit in applying the light emitting diode packageto mobile products, or the like.

In addition, the light emitting diode package according to the relatedart may emit light scattered without being converted by a phosphor layerfrom a side thereof, which may deteriorate optical properties of lightconverted by the phosphor layer.

Further, in the light emitting diode package according to the relatedart, it may be difficult to implement a large-area chip.

Moreover, in the light emitting diode package according to the relatedart, it may be difficult to implement heat generation and currentspreading when the area of the light emitting diode chip is increased.

Also, since the light emitting diode package according to the relatedart is manufactured by a process of manufacturing the light emittingdiode chips and a process of packaging the light emitting diode chips,the process is complicated and thus, a defective rate may be increasedand the manufacturing costs may be increased.

SUMMARY OF THE INVENTION

The present invention has been made to provide a light emitting diodepackage of a wafer level and a method of manufacturing the same byproviding a process of packaging light emitting diode chips whilemanufacturing the light emitting diode chips.

Further, the present invention has been made to provide a light emittingdiode package and a method of manufacturing the same capable of reducingemission of light scattered without being converted by a phosphor layerfrom a side of the light emitting diode package.

In addition, the present invention has been made to provide a large-arealight emitting diode package having a large emission area and a methodof manufacturing the same.

Moreover, the present invention has been made to provide a large-arealight emitting diode package and a method of manufacturing the samecapable of facilitating heat generation and current spreading.

Also, the present invention has been made to provide a light emittingdiode package and a method of manufacturing the same capable ofsimplifying a process and reducing a defective rate and manufacturingcosts.

According to an exemplary embodiment of the present invention, there isprovided a light emitting diode package, including: a first substrate, alight-emitting layer disposed on a surface of the first substrate andincluding a first type semiconductor layer, an active layer, and asecond type semiconductor layer, a first bump disposed on the first typesemiconductor layer and a second bump disposed the second typesemiconductor layer, a protective layer covering at least thelight-emitting layer, and a first bump pad and a second bump paddisposed on the protective layer and connected to the first bump and thesecond bump, respectively.

According to another exemplary embodiment of the present invention,there is provided a method of manufacturing a light emitting diodepackage, which includes: forming a pattern on a first substrate,sequentially forming a first type semiconductor layer, an active layer,and a second type semiconductor layer on a surface of the firstsubstrate to form a light-emitting layer, etching the first typesemiconductor layer, the active layer, and the second type semiconductorlayer to expose a portion of the first type semiconductor layer, forminga first bump and a second bump on the first type semiconductor layer andthe second type semiconductor layer, respectively, covering at least apart of the light-emitting layer with a protective layer, and forming afirst bump pad and a second bump pad on the first bump and the secondbump, respectively.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a furtherunderstanding of the invention and are incorporated in and constitute apart of this specification, illustrate embodiments of the invention, andtogether with the description serve to explain the principles of theinvention.

FIG. 1 is a cross-sectional view showing a light emitting diode packageaccording to an exemplary embodiment of the present invention.

FIG. 2 and FIG. 3 are a plan view and a cross-sectional view showing alight emitting diode package according to another exemplary embodimentof the present invention.

FIG. 4 and FIG. 5 are a plan view and a cross-sectional view showing alight emitting diode package according to another exemplary embodimentof the present invention.

FIG. 6 is a cross-sectional view showing a light emitting diode packageaccording to another exemplary embodiment of the present invention.

FIG. 7 and FIG. 8 are a plan view and a cross-sectional view showing alight emitting diode package according to another exemplary embodimentof the present invention.

FIG. 9 and FIG. 10 are a plan view and a cross-sectional view showing alight emitting diode package according to another exemplary embodimentof the present invention.

FIG. 11 is a plan view showing a light emitting diode package accordingto another exemplary embodiment of the present invention.

FIG. 12 is a plan view showing connection wirings of a light emittingdiode package according to another exemplary embodiment of the presentinvention.

FIG. 13 is a cross-sectional view showing a light emitting diode packageaccording to another exemplary embodiment of the present invention.

FIG. 14 is a plan view showing a light emitting diode package accordingto another exemplary embodiment of the present invention.

FIG. 15 is a plan view showing a light emitting diode package accordingto another exemplary embodiment of the present invention.

FIG. 16 and FIG. 17 are a plan view showing a light emitting diodepackage according to another exemplary embodiment of the presentinvention and a circuit diagram thereof.

FIG. 18 and FIG. 19 are a plan view showing a light emitting diodepackage according to another exemplary embodiment of the presentinvention and a circuit diagram thereof.

FIG. 20 to FIG. 27 are cross-sectional views showing a method ofmanufacturing a light emitting diode package according to an exemplaryembodiment of the present invention.

FIG. 28 to FIG. 38 are cross-sectional views showing a method ofmanufacturing a light emitting diode package according to an exemplaryembodiment of the present invention, and

FIG. 39 to FIG. 41 are cross-sectional views showing a method ofmanufacturing a light emitting diode package according to an exemplaryembodiment of the present invention.

DETAILED DESCRIPTION OF THE ILLUSTRATED EMBODIMENTS

The invention is described more fully hereinafter with reference to theaccompanying drawings, in which exemplary embodiments of the inventionare shown. This invention may, however, be embodied in many differentforms and should not be construed as limited to the exemplaryembodiments set forth herein. Rather, these exemplary embodiments areprovided so that this disclosure is thorough, and will fully convey thescope of the invention to those skilled in the art. In the drawings, thesize and relative sizes of layers and regions may be exaggerated forclarity. Like reference numerals in the drawings denote like elements.

It will be understood that when an element or layer is referred to asbeing “on” or “connected to” another element or layer, it can bedirectly on or directly connected to the other element or layer, orintervening elements or layers may be present. In contrast, when anelement is referred to as being “directly on” or “directly connected to”another element or layer, there are no intervening elements or layerspresent.

Hereinafter, exemplary embodiments of the present invention will bedescribed in detail with reference to the accompanying drawings.

FIG. 1 is a cross-sectional view showing a light emitting diode packageaccording to an exemplary embodiment of the present invention.

Referring to FIG. 1, a light emitting diode package 1100 according to anexemplary embodiment of the present invention may include a substrate1110, a semiconductor structure layer 1120, contact pads 1130, bumps1140, a protective layer 1150, and bump pads 1160.

In addition, the light emitting diode package 1100 may further include aphosphor layer 1170, a passivation layer 1180, and current spreadinglayers 1190. In this configuration, the phosphor layer 1170, thepassivation layer 1180, and the current spreading layers 1190 may beomitted if necessary.

The substrate 1110 may be a growth substrate. The growth substrate maybe a sapphire substrate, a silicon carbide substrate, a siliconsubstrate, or the like. One example of the growth substrate is asapphire substrate.

The semiconductor structure layer 1120, the contact pads 1130, the bumps1140, the protective layer 1150, and the bump pads 1160 are sequentiallyformed on a surface of the substrate 1110.

The other surface 1112 of the substrate 1110 may include patterns orruggedness such as a moth eye pattern (not shown), blast marks (notshown), or the like, so as to increase light emission efficiency.Further, the substrate 1110 may have lateral inclinations 1114 formed atthe corners thereof. The lateral inclinations 1114 may serve to increasethe light emission efficiency of light propagated to the sides of thesubstrate 1110.

In the exemplary light emitting diode package 1100, light may be emittedfrom the semiconductor structure layer 1120 disposed on the surface ofthe substrate 1110 and emitted from the other surface of the substrate1110.

The patterns or the ruggedness such as the moth eye pattern (not shown)or the blast marks (not shown) serves to increase the light emissionefficiency of light emitted from the other surface of the substrate1110. When the light emitted from the semiconductor structure layer1120, in particular, an active layer 1124, is emitted toward the othersurface of the substrate 1110, the light may be totally reflected fromthe other surface of the substrate 1110 along a propagation path oflight, such that the light may not be emitted. The patterns orruggedness such as the moth eye pattern (not shown), the blast marks(not shown), or the like, reduce the total reflection generated from theother surface of the substrate 1110 and thus increase the likelihoodthat the light is emitted from the other surface of the substrate 1110,thereby serving to increase the light emission efficiency of the lightemitting diode package 1100.

Meanwhile, the phosphor layer 1170 may be disposed on the other surfaceof the substrate 1110, for example, on the surface of the substrate 1110which emits light from the semiconductor structure layer 1120. Thephosphor layer 1170 serves to convert a wavelength of light emitted fromthe semiconductor structure layer 1120. The phosphor layer 1170 may bemade of the phosphor material converting the wavelength of light.

The semiconductor structure layer 1120 may include a first typesemiconductor layer 1122, an active layer 1124, a second typesemiconductor layer 1126, and a buffer layer (not shown) between thesubstrate 1110 and the first type semiconductor layer 1122. Thesemiconductor structure layer 1120 may function to emit light.

The buffer layer (not shown) may be provided so as to relieve a latticemismatch between the substrate 1110 and the first type semiconductorlayer 1122. In addition, the buffer layer (not shown) may be formed of asingle layer or a multi-layer. If the buffer layer is formed of themulti-layer, the buffer layer may be formed of a low-temperature bufferlayer and a high-temperature buffer layer.

The first type semiconductor layer 1122 may be disposed on the substrate1110. A portion of the first type semiconductor layer 1122 may beexposed as shown in FIG. 1. The first type semiconductor layer 1122 maybe exposed by performing mesa etching on a portion of the active layer1124 and the second type semiconductor layer 1126. When the mesa etchingis performed, a portion of the first type semiconductor layer 1122 maybe etched.

The first type semiconductor layer 1122 may be made of a first typeimpurity, for example, an (Al, In, Ga) N-series III group nitridesemiconductor that is doped with an N-type impurity. The first typesemiconductor layer 1122 may be made of a single layer or a multi-layer.For example, the first-type semiconductor layer 1122 may include a superlattice layer.

The active layer 1124 may be disposed on the first type semiconductorlayer 1122, and the active layer 1124 may be formed of the single layeror the multi-layer. In addition, the active layer 1124 may be a singlequantum well structure including a single well layer (not shown), or maybe provided in a multi-quantum well structure in which a well layer (notshown) and a barrier layer (not shown) are alternately stacked. In thisconfiguration, one or both of the well layer (not shown) and the barrierlayer (not shown) may be formed in a super lattice structure.

The second type semiconductor layer 1126 may be disposed on the activelayer 1124. The second type semiconductor layer 1126 may be made of (Al,In, Ga) N-series III group nitride semiconductor that is doped with thesecond type impurity, for example, the P-type impurity. The second typesemiconductor layer 1126 may be formed of the single layer or themulti-layer. For example, the second type semiconductor layer 1126 mayinclude a super lattice layer.

In addition, the semiconductor structure layer 1120 may include ablocking layer (not shown) between the active layer 1124 and the secondtype semiconductor layer 1126. The blocking layer (not shown) may beprovided so as to increase the recoupling efficiency of electrons andholes, and may be made of a material having a relatively wide band gap.The blocking layer (not shown) may be made of (Al, In, Ga) N-series IIIgroup nitride semiconductor, for example, may be made of AlGaN.

The passivation layer 1180 may be disposed on the substrate 1110 and thesemiconductor structure layer 1120. The passivation layer 1180 serves toprotect the semiconductor structure layer 1120 provided thereunder fromoutside environments and may be formed of an insulating layer such as asilicon oxide layer.

The passivation layer 1180 may include a first opening 1182 that exposesa portion of the surface of the first type semiconductor layer 1122through mesa etching, and a second opening 1184 that exposes a portionof the surface of the second type semiconductor layer 1126.

The contact pads 1130 may include a first contact pad 1132 and a secondcontact pad 1134. The first contact pad 1132 may provide contact to thefirst type semiconductor layer 1122 exposed by the first opening 1182.The second contact pad 1134 may provide contact to the second typesemiconductor layer 1126 exposed by the second opening 1184. In thisconfiguration, if the passivation layer 1180 is not provided, the firstcontact pad 1132 and the second contact pad 1134 may provide contact tothe semiconductor layers at certain positions of the first typesemiconductor layer 1122 and the second type semiconductor layer 1126,respectively.

In this case, although not shown in the drawings, the second typesemiconductor layer 1126 may include the high-concentration doped secondtype semiconductor layer (not shown) whose top portion is doped with thesecond type impurity at high concentration and may further include acontact layer (not shown) for ohmic contact between the second typesemiconductor layer 1126 and the second contact pad 1134.

The contact pads 1130 may be made of Ni, Cr, Ti, Al, Ag, Au, or thelike. The contact layer (not shown) may be made of a transparentconductive oxide (TCO) such as ITO, ZnO, IZO, or the like, and a contactmaterial such as Ni/Au, or the like.

The bumps 1140 may include a first bump 1142 and a second bump 1144. Thefirst bump 1142 may be disposed on the first contact pad 1132 and thesecond bump 1144 may be disposed on the second contact pad 1134. Thebumps 1140 may be made of Au, or the like. Meanwhile, the bumps 1140 maybe formed of a stud bump, and may be formed by depositing or coating andthen etching the material forming the bumps 1140.

The protective layer 1150 is disposed on the substrate 1110 and servesto protect the semiconductor structure layer 1120 by covering thesemiconductor structure layer 1120. For example, as shown in FIG. 1, theprotective layer 1150 serves to protect the top surface and sidesurfaces of the semiconductor structure layer 1120 disposed on a certainregion of the substrate 1110. The protective layer 1150 may be made ofan inorganic material such as a silicon-based oxide, silicon-basednitride, or the like. The protective layer 1150 may be made of anorganic material such as resin, or the like.

The current spreading layers 1190 are disposed on the protective layer1150, and may serve to provide electrical connection to the bumps 1140.When the bump pads 1160 are disposed on the substrate 1110 and theprotective layer 1150, the current spreading layers 1190 may be omittedby serving to facilitate the formation thereof. The current spreadinglayers 1190 may include a first current spreading layer 1192 and asecond current spreading layer 1194. The first current spreading layer1192 may serve to provide electrical connection to the first bump 1142,and the second current spreading layer 1194 may serve to provideelectrical connection to the second bump 1144.

The current spreading layers 1190 may be made of Ni, Cr, Ti, Al, Ag, Au,or the like.

The bump pads 1160 may be disposed on the current spreading layer 1190.In particular, the bump pads 1160 may include a first bump pad 1162 anda second bump pad 1164, and may serve to provide electrical connectionto the bumps 1140.

The bump pads 1160 may be made of Au, similar to the bumps 1140.

In this case, each of the first bump pad 1162 and the second bump pad1164 may have an area smaller than that of the first current spreadinglayer 1192 and the second current spreading layer 1194, and may have anarea smaller than that of the first contact pad 1132 and the secondcontact pad 1134, but is not limited thereto. That is, each of the firstbump pad 1162 and the second bump pad 1164 may have an area equal to orslightly larger than that of the first current spreading layer 1192 andthe second current spreading layer 1194, and have an area equal to orslightly larger than that of the first contact pad 1132 and the secondcontact pad 1134.

Therefore, the light emitting diode package 1100 according to theexemplary embodiment of the present invention may include thesemiconductor structure layer 1120, the contact pads 1130, and the bumps1140 on the substrate 1110, the protective layer 1150 that protects atleast the semiconductor structure layer 1120 as well as thesemiconductor structure layer 1120, the contact pads 1130, the bumps1140, and the bump pads 1160 on the protective layer 1150 that areelectrically connected to the bumps 1140 such that the substrate formingthe semiconductor structure layer 1120 is packaged, that is, packaged atthe wafer level to make the separate package process unnecessary,thereby providing the light emitting diode package having a smallersize.

FIG. 2 and FIG. 3 are a plan view and a cross-sectional view showing alight emitting diode package according to another exemplary embodimentof the present invention. FIG. 3 shows a cross-sectional view takenalong line A-A′ of FIG. 2, and FIG. 2 shows a plan view of the substrate1110 seen from a surface thereof.

Referring to FIG. 2 and FIG. 3, only the bump pads 1160 of the lightemitting diode package 1200 according to another exemplary embodiment ofthe present invention is different from the bump pads 1160 of the lightemitting diode package 1100 in FIG. 1, and other components thereof arethe same as in FIG. 1. Therefore, the description of the same componentswill be omitted and only the bump pads 1160 will be described.

The light emitting diode package 1200 according to another exemplaryembodiment of the present invention may include the substrate 1110, thesemiconductor structure layer 1120, the contact pads 1130, the bumps1140, the protective layer 1150, and the bump pads 1160.

In addition, although not shown in the drawings, the light emittingdiode package 1200 may further include the passivation layer 1180 andthe current spreading layer 1190 as described above for the lightemitting diode package 1100 with reference to FIG. 1. In thisconfiguration, the passivation layer 1180 and the current spreadinglayers 1190 are omitted from the drawings. In addition, the lightemitting diode package 1200 may include the patterns or the ruggednesssuch as the moth eye pattern (not shown) or the blast marks (not shown)on the other surface 1112 of the substrate 1110 so as to increase thelight emission efficiency. The light emitting diode package 1200 mayalso include the buffer layer (not shown) between the substrate 1110 andthe first type semiconductor layer 1122, the blocking layer (not shown)between the active layer 1124 and the second type semiconductor layer1126, and the high-concentration doped second type semiconductor layer(not shown) and the contact layer (not shown) between the second typesemiconductor layer 1126 and the second contact pad 1134.

The bump pads 1160 may be disposed on a surface of the light emittingdiode package 1200. Specifically, the bump pads 1160 are disposed on thesurface of the protective layer 1150 on a surface of the substrate 1110,as shown in FIG. 2 and FIG. 3.

In this configuration, the bump pads 1160 may include a first bump pad1162′ and a second bump pad 1164′, and the first bump pad 1162′ and thesecond bump pad 1164′ may be disposed on the protective layer 1150. Thefirst bump pad 1162′ and the second bump pad 1164′ may have the samesize. In particular, as shown in FIG. 2, the first bump pad 1162′ andthe second bump pad 1164′ may be provided within the regioncorresponding to the semiconductor structure layer 1120. Alternatively,although not shown in FIG. 2, the first bump pad 1162′ and the secondbump pad 1164′ may cover the entire surface of the protective layer1150. That is, the first bump pad 1162′ and the second bump pad 1164′ ofthe light emitting diode package 1200 shown in FIG. 2 and FIG. 3 have anarea larger than the first bump pad 1162 and the second bump pad 1164 ofthe light emitting diode package 1100 shown in FIG. 1, such that theymay be easily mounted in other devices such as the light emitting diodepackage 1200.

FIG. 4 and FIG. 5 are a plan view and a cross-sectional view showing alight emitting diode package according to another exemplary embodimentof the present invention. In this case, FIG. 5 shows a cross-sectionalview taken along line B-B′ of FIG. 4, and FIG. 4 shows a plan view ofthe substrate 1110 seen from a surface thereof.

Referring to FIG. 4 and FIG. 5, only the contact pads 1130 of the lightemitting diode package 1300 according to another exemplary embodiment ofthe present invention is different from the contact pads 1130 of thelight emitting diode package 1200 shown in FIG. 2 and FIG. 3, and othercomponents thereof are the same as in FIG. 2 and FIG. 3. Therefore, thedescription of the same components will be omitted and only the contactpads 1130 will be described.

In other words, the light emitting diode package 1300 according toanother exemplary embodiment of the present invention may include thesubstrate 1110, the semiconductor structure layer 1120, the contact pads1130, the bumps 1140, the protective layer 1150, and the bump pads 1160.

In addition, although not shown in the drawings, the light emittingdiode package 1300 may further include the passivation layer 1180 andthe current spreading layer 1190 as described above for the lightemitting diode package 1100 with reference to FIG. 1. In thisconfiguration, the passivation layer 1180 and the current spreadinglayers 1190 are omitted from the drawings. In addition, the lightemitting diode package 1200 may include the patterns or the ruggednesssuch as the moth eye pattern (not shown) or the blast marks (not shown)on the other surface 1112 of the substrate 1110 so as to increase thelight emission efficiency. The light emitting diode package 1300 mayalso include the buffer layer (not shown) between the substrate 1110 andthe first type semiconductor layer 1122, the blocking layer (not shown)between the active layer 1124 and the second type semiconductor layer1126, and the high-concentration doped second type semiconductor layer(not shown) and the contact layer (not shown) between the second typesemiconductor layer 1126 and the second contact pad 1134.

The contact pads 1130, in particular, the second contact pad 1134′ maybe disposed to cover a wide area of the surface of the second typesemiconductor layer 1126, as shown in FIG. 4 and FIG. 5. Therefore, thelight emitting diode package 1300 includes the wide second contact pad1134′, such that the plurality of second bumps 1144 may be disposed onthe second contact pad 1134′. In addition, the first contact pad 1132′is also formed to have a wide area and thus, may also include theplurality of first bumps 1142.

FIG. 6 is a cross-sectional view showing a light emitting diode packageaccording to another exemplary embodiment of the present invention.

Referring to FIG. 6, a light emitting diode package 2100 according to anexemplary embodiment of the present invention may include a growthsubstrate 2110, a semiconductor structure layer 2120, contact pads 2130,bumps 2140, a protective layer 2150, bump pads 2160, a substrate 2210,electrodes 2220, and a conductive adhesive material 2230.

In addition, the light emitting diode package 2100 may further include aphosphor layer 2170, a passivation layer 2180, and pad protective layers2190. In this configuration, the phosphor layer 2170, the passivationlayer 2180, and the pad protective layers 2190 may be omitted ifnecessary.

The growth substrate 2110 may be a sapphire substrate, a silicon carbidesubstrate, a silicon substrate, or the like. In the exemplaryembodiment, the growth substrate is a sapphire substrate.

The semiconductor structure layer 2120, the contact pads 2130, the bumps2140, the protective layer 2150, and the bump pads 2160 are sequentiallyformed on a surface of the growth substrate 2110.

The other surface 2112 of the growth substrate 2110 may include patternsor ruggedness such as a moth eye pattern (not shown), blast marks (notshown), or the like, so as to increase light emission efficiency.Further, the growth substrate 2110 may have lateral inclinations 2114formed at the corners thereof. The lateral inclination 2114 may serve toincrease the light emission efficiency of light propagated to the sidesof the growth substrate 2110.

In the exemplary light emitting diode package 2100, light may be emittedfrom the semiconductor structure layer 2120 disposed on a surface of thegrowth substrate 2110 and emitted from the other surface of the growthsubstrate 2110.

The patterns or the ruggedness such as the moth eye pattern (not shown)or the blast marks (not shown) may serve to increase the light emissionefficiency of light directed from the other surface of the growthsubstrate 2110. When the light emitted from the semiconductor structurelayer 2120, in particular, the active layer 2124 is emitted from theother surface of the growth substrate 2110, the light may be totallyreflected from the other surface of the growth substrate 2110 along apropagation path of light, such that the light may not be emitted. Thepatterns or ruggedness such as the moth eye pattern (not shown), theblast marks (not shown), or the like, reduce the total reflectiongenerated from the other surface of the growth substrate 2110 toincrease the likelihood that the light is emitted from the other surfaceof the growth substrate 2110, thereby serving to increase the lightemission efficiency of the light emitting diode package 2100.

Meanwhile, the phosphor layer 2170 may be disposed on the other surfaceof the growth substrate 2110, for example, on the surface of thesubstrate 2110 which emits light from the semiconductor structure layer2120. The phosphor layer 2170 serves to convert a wavelength of lightemitted from the semiconductor structure layer 2120. The phosphor layer2170 may be made of the phosphor material converting the wavelength oflight.

The semiconductor structure layer 2120 may include a first typesemiconductor layer 2122, an active layer 2124, a second typesemiconductor layer 2126, and a buffer layer (not shown) between thegrowth substrate 2110 and the first type semiconductor layer 2122.

The buffer layer (not shown) may be provided so as to relieve a latticemismatch between the growth substrate 2110 and the first typesemiconductor layer 2122. In addition, the buffer layer (not shown) maybe formed of a single layer or a multi-layer. If the buffer layer isformed of the multi-layer, the buffer layer may be formed of alow-temperature buffer layer and a high-temperature buffer layer.

The first type semiconductor layer 2122 may be disposed on the growthsubstrate 2110. A portion of the first type semiconductor layer 2122 maybe exposed as shown in FIG. 6. Here, the first type semiconductor layer2122 may be exposed by performing mesa etching on a portion of theactive layer 2124 and the second type semiconductor layer 2126. When themesa etching is performed, a portion of the first type semiconductorlayer 2122 may be etched.

The first type semiconductor layer 2122 may be made of a first typeimpurity, for example, an (Al, In, Ga) N-series III group nitridesemiconductor material that is doped with an N-type impurity, and thefirst type semiconductor layer 2122 may be made of a single layer or amulti-layer. For example, the first type semiconductor layer 2122 mayinclude a super lattice layer.

The active layer 2124 may be disposed on the first type semiconductorlayer 2122, and the active layer 2124 may be formed of the single layeror the multi-layer. In addition, the active layer 2124 may be a singlequantum well structure including a single well layer (not shown), or maybe provided in a multi-quantum well structure in which a well layer (notshown) and a barrier layer (not shown) are alternately stacked. In thisconfiguration, one or both of the well layer (not shown) and the barrierlayer (not shown) may be formed in a super lattice structure.

The second type semiconductor layer 2126 may be disposed on the activelayer 2124. The second type semiconductor layer 2126 may be made of (Al,In, Ga) N-series III group nitride semiconductor that is doped with thesecond type impurity, for example, the P-type impurity. The second typesemiconductor layer 2126 may be formed of the single layer or themulti-layer. For example, the second type semiconductor layer 2126 mayinclude a super lattice layer.

In addition, the semiconductor structure layer 2120 may include ablocking layer (not shown) between the active layer 2124 and the secondtype semiconductor layer 2126. The blocking layer (not shown) may beprovided so as to increase the recoupling efficiency of electrons andholes and may be made of a material having a relatively wide band gap.The blocking layer (not shown) may be made of (Al, In, Ga) N-series IIIgroup nitride semiconductor, for example, may be made of AlGaN, or thelike.

The passivation layer 2180 may be disposed on the growth substrate 2110and the semiconductor structure layer 2120. The passivation layer 2180serves to protect the semiconductor structure layer 2120 providedthereunder from outside environments and may be formed of an insulatinglayer such as a silicon oxide layer.

The passivation layer 2180 may include a first opening 2182 that exposesa portion of the surface of the first type semiconductor layer 2122through mesa etching, and a second opening 2184 that exposes a portionof the surface of the second type semiconductor layer 2126.

The contact pads 2130 may include a first contact pad 2132 and a secondcontact pad 2134. The first contact pad 2132 may provide contact to thefirst type semiconductor layer 2122 exposed by the first opening 2182.The second contact pad 2134 may provide contact to the second typesemiconductor layer 2126 exposed by the second opening 2184. In thisconfiguration, if the passivation layer 2180 is not provided, each ofthe first contact pad 2132 and the second contact pad 2134 may providecontact to the semiconductor layers at certain positions of the firsttype semiconductor layer 2122 and the second type semiconductor layer2126.

In this case, although not shown in the drawings, the second typesemiconductor layer 2126 may include the second type semiconductor layer(not shown) doped with the second type impurity at high concentration,and may further include a contact layer (not shown) for ohmic contactbetween the second type semiconductor layer 2126 and the second contactpad 2134.

The contact pads 2130 may be made of Ni, Cr, Ti, Al, Ag, Au, or thelike. The contact layer (not shown) may be made of TCO such as ITO, ZnO,IZO, or the like, and a contact material such as Ni/Au, or the like.

The bumps 2140 may include a first bump 2142 and a second bump 2144. Thefirst bump 2142 may be disposed on the first contact pad 2132, and thesecond bump 2144 may be disposed on the second contact pad 2134. Thebumps 2140 may be made of Au, or the like. Meanwhile, the bumps 2140 maybe formed of a stud bump and may be formed by depositing or coating andetching the material forming the bumps 2140.

The protective layer 2150 is disposed on the growth substrate 2110, andserves to protect the semiconductor structure layer 2120 by covering atleast the semiconductor structure layer 2120. For example, as shown inFIG. 1, the protective layer 2150 also serves to protect the top surfaceand side surfaces of the semiconductor structure layer 2120 disposed ona certain region of the growth substrate 2110. The protective layer 2150may be made of an inorganic material such as a silicon-based oxide,silicon-based nitride, or the like, or may be made of an organicmaterial such as resin, or the like.

The bump pads 2160 may be disposed on the protective layer 2150. Thatis, the bump pads 2160 may include a first bump pad 2162 and a secondbump pad 2164. The first bump pad 2162 may be electrically connected tothe first bump 2142, and the second bump pad 2194 may be electricallyconnected to the second bump 2144.

The bump pads 2160 may be made of Au, similar to the bumps 2140.

The pad protective layers 2190 are disposed on the bump pads 2160 andmay be electrically connected to the bump pads 2160 to protect the bumppads 2160. The pad protective layers 2190 reduce the likelihood ofdiffusion or oxidation of the bump pads 2160 at the time of the bondingor storage of the growth substrate 2110. The pad protective layers 2190may include the first pad protective layer 2192 and the second padprotective layer 2194. The first pad protective layer 2192 may bedisposed on the first bump pad 2162 and the second pad protective layer2194 may be disposed on the second bump pad 2164.

The pad protective layer 2190 may be made of Ni, Au, W, Pd, an organicmaterial, or the like.

In this case, each of the first bump pad 2162 and the second bump pad2164 may have an area equal to or smaller than that of the first currentspreading layer 2192 and the second current spreading layer 2194, butthe area of the first bump pad 2162 and the second bump pad 2164 is notlimited thereto. In addition, the size of the first bump pad 2162 andthe second bump pad 2164 may vary depending on the design, performance,and characteristics of the semiconductor structure layer 2120 and thebump 2140.

The substrate 2210 may be an a printed circuit board (PCB) or aninsulating substrate such as ceramic, or the like, and the growthsubstrate 2110, in particular, a thermo-conductive substrate having moreexcellent thermoconductivity than that of the sapphire substrate. Theinside of the substrate 2210 may be made of metals having excellentthermoconductivity and the outside thereof may be insulated by coveringan insulating material layer on the substrate 2210. The substrate 2210may have the same size as the growth substrate 2110, and, may have alarger size than the growth substrate 2110.

The electrodes 2220 may be disposed on the surface of the substrate2210. The electrodes 2220 may correspond to the bump pads 2160 or thepad protective layers 2190 that are disposed on the growth substrate2110. That is, the first electrode 2222 of the electrodes 2220corresponds to the first bump pad 2162 or the first pad protective layer2192 and the second electrode 2224 thereof may correspond to the secondbump pad 2164 or the second pad protective layer 2194. The electrodes2220 may serve as a contact terminal that connects the light emittingdiode package 2100 with external devices or external power supplies, andmay serve as a connection wiring that electrically connects to the lightemitting diode package 2100.

The conductive adhesive material 2230 may serve to mount the growthsubstrate 2110 on the substrate 2210. That is, the conductive adhesivematerial 2230 may serve to physically couple the growth substrate 2110with the substrate 2210. In addition, the conductive adhesive material2230 may serve to electrically connect the bump pads 2160 disposed onthe growth substrate 2110 to the electrodes 2220 disposed on thesubstrate 2210. In this case, the conductive adhesive material 2230 mayinclude a first conductive adhesive material 2232 and a secondconductive adhesive material 2234, wherein the first conductive material2232 and the second conductive adhesive material 2234 are physically andelectrically separated from each other. The first conductive adhesivematerial 2232 electrically connects the first bump pad 2162 or the firstpad protective layer 2192 to the first electrode 2222, and the secondconductive adhesive material 2234 electrically connects the second bumppad 2164 or the second pad protective layer 2194 to the second electrode2224, wherein the first conductive adhesive material 2232 and the secondconductive adhesive material 2234 are electrically and physicallyseparated from each other. In this case, the conductive adhesivematerial 2230 may be made of at least one of tin, gold, silver, bismuth,antimony, copper, and the like.

The conductive adhesive material 2230 may cover at least a portion ofthe top of the growth substrate 2110 and the semiconductor structurelayer 2120, in particular, the top portion of the passivation layer 2180or the protective layer 2150 covering the semiconductor structure layer2120.

If the light emitting diode package 2100 includes the phosphor layer2170 to convert the light emitted from the light emitting layer 2124into different wavelengths, the conductive adhesive material 2230 mayserve to reduce the light scattered without being converted by thephosphor layer 2170 being emitted to the outside by propagating thelight emitted from the light emitting layer 2124 to the side thereof.That is, the conductive adhesive material 2230 may reduce the light notconverted by the phosphor layer 2170 being emitted to the outside,thereby making the optical characteristics having the convertedwavelength in the phosphor layer 2170 excellent.

In this case, as shown in FIG. 1, covering the top portion of the growthsubstrate 2110 and the semiconductor structure layer 2120 with theconductive adhesive material 2230 may mean covering the entire side ofthe semiconductor structure layer 2120 and the entire side of the growthsubstrate 2110 (in this case, the side of the growth substrate 2110means the side other than the surface of the lateral inclination 2114 ofthe growth substrate on which the phosphor layer 2170 is provided). Inaddition, although not shown in the drawings, covering the bottomportion of the growth substrate 2110 and the semiconductor structurelayer 2120 with the conductive adhesive material 2230 may mean the formin which the side of the semiconductor structure layer 2120 is partiallycovered without covering the side of the growth substrate 2110, theentire side of the semiconductor structure layer 2120, or the side ofthe semiconductor structure layer 2120 and the side of the growthsubstrate 2110 is partially covered. That is, covering the top portionand the bottom portion of the growth substrate 2110 and thesemiconductor structure layer 2120 with the conductive adhesive material2230 means a form in which the conductive adhesive material 2230 isdisposed on the propagation path of light so as to reduce the light notabsorbed by the phosphor layer 2170 and emitted among the light emittedfrom the light emitting layer 2124 of the semiconductor structure layer2120.

In this case, since the conductive adhesive material 2230 includes thefirst conductive adhesive material 2232 and the second conductiveadhesive material 2234 and the first conductive adhesive material 2232and the second conductive adhesive material 2234 need to be separatedfrom each other so as to be electrically insulated from each other, asshown in FIG. 7 and FIG. 9 to be described below, a form in whichregions of the side of the semiconductor structure layer 2120 and theside of the growth substrate 2110 is not partially covered may beprovided.

Therefore, the semiconductor structure layer 2120, the contact pads2130, and the bumps 2140 on the growth substrate 2110, and at least thesemiconductor structure layer 2120 are disposed on the light emittingdiode package 2100. The light emitting diode package 2100 may alsoinclude the protective layer 2150 that protects the semiconductorstructure layer 2120, the contact pads 2130, the bumps 2140, and thebump pads 2160 on the protective layer 2150 that are electricallyconnected to the bumps 2140, such that the growth substrate forming thesemiconductor structure layer 2120 is packaged, that is, packaged at thewafer level to make the separate package process unnecessary, therebyproviding the light emitting diode package having a small size.

In addition, the light emitting diode package 2100 includes theconductive adhesive material 2230 covering the top portion or the bottomportion of the growth substrate 2110 and the semiconductor structurelayer 2120. As a result, the light emitting diode package may reduce thelight being emitted to the side among the light emitted from the activelayer 2124 without being absorbed into the phosphor layer 2170.

FIG. 7 and FIG. 8 are a plan view and a cross-sectional view showing alight emitting diode package according to another exemplary embodimentof the present invention. In this case, FIG. 8 shows a cross-sectionalview taken along line C-C′ of FIG. 7, and FIG. 7 shows a plan view of asurface of the growth substrate 2110.

Referring to FIG. 7 and FIG. 8, only the bump pads 2160 of the lightemitting diode package 2200 are different from the bump pads 2160 of thelight emitting diode package 2100 described with reference to FIG. 6,and other components thereof are the same as FIG. 1. Therefore, thedescription of the same components will be omitted and only the bumppads 2160 will be described in detail. Meanwhile, the corners of thegrowth substrate 2110 according to another exemplary embodiment of thepresent invention need not be inclined.

That is, the light emitting diode package 2200 may include the growthsubstrate 2110, the semiconductor structure layer 2120, the contact pads2130, the bumps 2140, the protective layer 2150, the bump pads 2160, thesubstrate 2210, the electrodes 2220, and the conductive adhesivematerial 2230. In this case, the conductive adhesive material 2230 maybe provided so that the region (shown by reference numeral 2236) of theside of the semiconductor structure layer 2120 and the side of thegrowth substrate 2110 is not partially covered as shown in FIG. 7.

In addition, although not shown in the drawings, the light emittingdiode package 2200 may further include the passivation layer 2180 andthe pad protective layers 2190 of the light emitting diode package 2100described with reference to FIG. 6 as described above. In this case, thepassivation layer 2180 and the pad protective layers 2190 may also beomitted. In addition, the light emitting diode package 2200 may includethe patterns or the ruggedness such as the moth eye pattern (not shown)or the blast marks (not shown) on the other surface 2112 of the growthsubstrate 2110 so as to increase the light emission efficiency, thebuffer layer (not shown) between the growth substrate 2110 and the firsttype semiconductor layer 2122, the blocking layer (not shown) betweenthe active layer 2124 and the second type semiconductor layer 2126, andthe high-concentration doped second type semiconductor layer (not shown)and the contact layer (not shown) between the second type semiconductorlayer 2126 and the second contact pad 2134.

The bump pads 2160 may be disposed on a surface of the light emittingdiode package 2200 and on the surface of the protective layer 2150 on asurface of the growth substrate 2110, as shown in FIG. 7 and FIG. 8.

In this configuration, the bump pads 2160 may include a first bump pad2162′ and a second bump pad 2164′. The first bump pad 2162′ and thesecond bump pad 2164′ may be disposed on the protective layer 2150, andhave the same size. In particular, as shown in FIG. 7, the first bumppad 2162′ and the second bump pad 2164′ may be provided within theregion corresponding to the semiconductor structure layer 2120. Also,unlike what is shown in FIG. 7, the first bump pad 2162′ and the secondbump pad 2164′ may be provided so as to cover the entire surface of theprotective layer 2150. That is, the first bump pad 2162′ and the secondbump pad 2164′ of the light emitting diode package 2200 shown in FIG. 7and FIG. 8 have an area larger than the first bump pad 2162 and thesecond bump pad 2164 of the light emitting diode package 2100 shown inFIG. 6, such that they may be easily mounted in other devices such asthe light emitting diode package 2200.

FIG. 9 and FIG. 10 are a plan view and a cross-sectional view showing alight emitting diode package according to another exemplary embodimentof the present invention. In this case, FIG. 10 shows a cross-sectionalview taken along line D-D′ of FIG. 9, and FIG. 9 shows a plan view of asurface of the growth substrate 2110.

Referring to FIG. 9 and FIG. 10, only the contact pads 2130 of the lightemitting diode package 2300 are different from the contact pads 2130 ofthe light emitting diode package 2200 described with reference to FIG. 7and FIG. 8, and other components thereof are the same. Therefore, thedescription of the same components will be omitted and only the contactpads 2130 will be described.

That is, the light emitting diode package 2300 may include the growthsubstrate 2110, the semiconductor structure layer 2120, the contact pads2130, the bumps 2140, the protective layer 2150, the bump pads 2160, thesubstrate 2210, the electrodes 2220, and the conductive adhesivematerial 2230. In this case, the conductive adhesive material 2230 maybe provided so that the region (shown by reference numeral 2236) of theside of the semiconductor structure layer 2120 and the side of thegrowth substrate 2110 is not partially covered as shown in FIG. 7.

In addition, although not shown in the drawings, the light emittingdiode package 2300 may further include the passivation layer 2180 andthe pad protective layers 2190 of the light emitting diode package 2100described with reference to FIG. 6 as described above. In this case, thepassivation layer 2180 and the pad protective layers 2190 may also beomitted. In addition, the light emitting diode package 2300 may includethe patterns or the ruggedness such as the moth eye pattern (not shown)or the blast marks (not shown) on the other surface 2112 of the growthsubstrate 2110 so as to increase the light emission efficiency, thebuffer layer (not shown) between the substrate 2110 and the first typesemiconductor layer 2122, the blocking layer (not shown) between theactive layer 2124 and the second type semiconductor layer 2126, and thehigh-concentration doped second type semiconductor layer (not shown) andthe contact layer (not shown) between the second type semiconductorlayer 2126 and the second contact pad 2134.

The contact pads 2130, in particular, the second contact pad 2134′ maycover a wide area of the surface of the second type semiconductor layer2126, as shown in FIG. 9 and FIG. 10. Therefore, the light emittingdiode package 2300 according to another exemplary embodiment of thepresent invention includes the wide second contact pad 2134′, such thatthe plurality of second bumps 2144 may be disposed on the second contactpad 2144′. In addition, the first contact pad 2132′ is also formed tohave a wide area and thus, may also include the plurality of first bumps2142.

FIG. 11 and FIG. 13 are a plan view and a cross-sectional view showing alight emitting diode package according to another exemplary embodimentof the present invention. In this case, FIG. 12 is a plan view showingconnection wirings of a light emitting diode according to anotherexemplary embodiment of the present invention, and FIG. 13 is across-sectional view taken along line E-E′ of FIG. 11. In this case,FIG. 12 shows a structure in which the connection wirings 3160, whichwill be described below, are exposed, wherein components on theconnection wirings 3160 are omitted.

Referring to FIG. 11 and FIG. 13, a light emitting diode package 3100according to another exemplary embodiment of the present invention mayinclude a growth substrate 3110, a semiconductor structure layer 3120,an ohmic contact layer 3130, pads 3140, insulating layers 3150,connection wirings 3160, bumps 3170, and contact parts 3180.

In this case, the semiconductor structure layer 3120 may include a firsttype semiconductor layer 3122, an active layer 3124, and a second typesemiconductor layer 3126. The pads 3140 may include a first pad 3142 anda second pad 3144. The insulating layers 3150 may include a firstinsulating layer 3152, a second insulating layer 3154, and a thirdinsulating layer 3156. The connection wirings 3160 may include a firstconnection wiring 3162 and a second connection wiring 3164. The bumps3170 may include a first bump 3172 and a second bump 3174. The contactparts 3180 may include a first contact part 3182 and a second contactpart 3184.

The growth substrate 3110 may be a sapphire substrate, a glasssubstrate, a silicon substrate, or the like, but is not limited thereto.The growth substrate 3110 may be any substrate capable of forming thesemiconductor structure layer 3120. The sapphire substrate may beexemplarily used as the growth substrate 3110.

The semiconductor structure layer 3120 may be disposed on the growthsubstrate 3110. In this case, a plurality of semiconductor structurelayers 3120 may be disposed on the growth substrate 3110. As shown inFIG. 11 and FIG. 12, the semiconductor structure layer 3120 may beprovided in an n×n array form (in this case, n is an integer number of 1or more). Another exemplary embodiment of the present inventiondiscloses that the semiconductor structure layers 3120 are provided in a4×4 array form.

Each of the semiconductor structure layers 3120 may be disposed on astructure region (SR) of the growth substrate 3110. In this case, thefirst type semiconductor layers 3122 of the semiconductor structurelayers 3120 may be connected with one another, and the first typesemiconductor layers 3122 are disposed only in the structure region (SR)and may be provided in gap regions GRs while they are separated fromeach other.

Meanwhile, the semiconductor structure layers 3120 may be enclosed bythe gap regions GRs in which the semiconductor structure layers 3120 areseparated from each other by performing the mesa etching on the activelayer 3124 and the second type semiconductor layer 3126. The gap regionsGRs may include a region exposed by etching the active layer 3124 andthe second type semiconductor layer 3126 of the semiconductor structurelayer 3120 by the mesa etching as shown in FIG. 3, that is, a partialregions of the exposed first semiconductor layer 3122.

The semiconductor structure layer 3120 may further include a superlattice layer (not shown) or an electronic blocking layer (not shown).In this case, in the semiconductor structure layer 3120, other layersother than the active layer 3124 may be omitted.

In this case, the first type semiconductor layer 3122 may be made of afirst type impurity, for example, a III-N series compound semiconductormaterial doped with N-type impurities, for example, an (Al, In, Ga)N-series III group nitride semiconductor material and may be a GaNlayer, that is, an N—GaN layer doped with the N-type impurity. The firsttype semiconductor layer 3122 may be made of a single layer or amulti-layer. If the first type semiconductor layer 3122 is formed of amulti-layer, the first type semiconductor layer 3122 may be formed ofthe super lattice structure.

The active layer 3124 may be made of a III-N series compoundsemiconductor material, for example, (Al, In, Ga) N semiconductor layer,and the active layer 3124 may be formed of the single layer or themulti-layer. In addition, the active layer 3124 may be a single quantumwell structure including a single well layer (not shown), or may have amulti-quantum well structure in which a well layer (not shown) and abarrier layer (not shown) are alternately stacked, wherein one or bothof the well layer (not shown) and the barrier layer (not shown) may beformed of the super lattice structure.

The second type semiconductor layer 3126 may be made of the second typeimpurity, for example, a III-N series compound semiconductor materialdoped with P-type impurities, for example, an (Al, In, Ga) N-series IIIgroup nitride semiconductor material and may be a GaN layer, that is, anP—GaN layer doped with the P-type impurity. The second typesemiconductor layer 3126 may be made of a single layer or a multi-layer.If the second type semiconductor layer 3126 is formed of a multi-layer,the second type semiconductor layer 3126 may be formed of the superlattice structure.

The super lattice layer (not shown) may be provided between the firsttype semiconductor layer 3122 and the active layer 3124. The superlattice layer may have a structure in which the III-N series compoundsemiconductor material, for example, (Al, Ga, In) N semiconductor layeris stacked in a multi-layer, for example, an InN layer and an InGaNlayer are alternately stacked and the super lattice layer is disposed ata position formed before the active layer to reduce the transfer ofdislocation, defect, or the like, to the active layer 3124, which mayserve to relieve the formation of the dislocation, defects, or the like,of the active layer 3124 and to implement the excellent crystallinity ofthe active layer 3124.

The electronic blocking layer (not shown) may be provided between theactive layer 3124 and the second type semiconductor layer 3126. Theelectronic blocking layer may be provided so as to increase therecombination efficiency of holes and electrons, and may be formed of arelatively wide band gap. The electronic blocking layer may be made of a(Al, In, Ga) N-series III group nitride semiconductor material, forexample, may be made of P—AlGaN doped with Mg.

The ohmic contact layer 3130 may be disposed on the semiconductorstructure layers 3120. The ohmic contact layer 3130 may be disposed onthe second type semiconductor layer 3126 of the semiconductor structurelayers 3120. The ohmic contact layer 3130 may be provided so as to formohmic-contact to the second type semiconductor layer 3126.

The ohmic contact layer 3130 may be made of ITO. In addition, the ohmiccontact layer 3130 may include a metal layer made of metal materialssuch as Ni, Ag, Cu, or the like, or an alloy thereof, wherein the metallayer may be provided in a single layer or a multi-layer. If the ohmiccontact layer 3130 is made of metal materials, the ohmic contact layer3130 may serve to reflect the light emitted from the semiconductorstructure layer 3120 to the growth substrate 3110.

If the ohmic contact layer 3130 is made of ITO, the ohmic contact layermay have a thickness of 500 to 2000 nm, for example, 1200 nm.

The pads 3140 may include one or more first pads 3142 and one or moresecond pad 3144.

The first pad 3142 may be disposed on a certain region of the first typesemiconductor layer 3122 exposed by performing the mesa etching on thegap region GR, in order words, the second type semiconductor layer 3126and the active layer 3124. In this case, the first pad 3142 serves tosupply power to the first type semiconductor layer 3122 and thus, may beprovided at a certain position to supply uniform current to thesemiconductor structure layer 3120. If the semiconductor structurelayers 3120 are a polygonal shape such as a rectangular shape, or thelike, they may be disposed on the certain region of the exposed firsttype semiconductor layer 3122 corresponding to the corners of thesemiconductor structure layers 3120.

The first pad 3142 may be made of a metal material and may be providedin at least one layer which includes at least one of Ni, Au, and Ti, forexample, three layers such as Ni/Au/Ti layers, wherein a thickness ofeach layer may have 300 nm, 3000 nm, and 100 nm, respectively. In thiscase, a material and a thickness of the first pad 3142 are only anexample. Therefore, the material and the thickness thereof may bemodified in various manners. For example, the first pad 3142 may beformed of a Ti/Al layer.

The second pad 3144 may be provided in the structure region SR, that is,on the ohmic contact layer 3130 of the second type semiconductor layer3126. The second pad 3144 serves to supply power to the second typesemiconductor layer 3122 through the ohmic contact layer 3130 andcorresponds to the first pad. Therefore, the second pad 3144 may beprovided at a position in consideration of a positional relation withthe first pad 3142 and may be positioned at a center of the second typesemiconductor layer 3126.

The second pad 3144 may be made of a metal material and may be formed ofat least one layer which includes Cr or Al, for example, three layerssuch as Cr/Al/Cr layers, or, three layers such as Cr/Al/Cr layers,wherein a thickness of each layer may have 10 nm, 2500 nm, and 300 nm,respectively. In this case, a material and a thickness of the second pad3144 are only an example. Therefore, the material and the thicknessthereof may be modified in various manners. For example, the second pad3144 may be formed of a Ni/Ag or Ag—Cu layer.

The first insulating layer 3152 of the insulating layers 3150 may bedisposed on the growth substrate 3110 including the first pad 3142 andthe second pad 3144.

The first insulating layer 3152 includes openings 3152 a and 3152 b thatopen the first pad 3142 and the second pad 3144, respectively. In thiscase, the openings 3152 a and 3152 b expose the certain region of thegap region GR adjacent to corners of the semiconductor structure layer3120 and the certain regions of the first pad 3142 and the second pad3144 positioned at the center of the semiconductor structure layer 3120,that is, the center of the structure region SR as shown in FIG. 11 andFIG. 12.

The first insulating layer 3152 may be formed of an oxide layer, anitride layer, or an organic insulating layer, for example, a siliconoxide layer. The first insulating layer 3152 may have a thickness of2000 to 10000 nm, for example, a thickness of 4800 nm.

Meanwhile, the first insulating layer 3152 may be formed of adistributed Bragg reflection (DBR) layer formed on insulating layershaving different refractive indexes. That is, the first insulating layer3152 may be provided so that two insulating layers having differentrefractive indexes are repeatedly stacked several times. When the firstinsulating layer 3152 is formed of the DBR layer, the light emissionefficiency can be increased in the direction of the growth substrate3110 by using the reflection characteristics of the DBR layer.

The connection wirings 3160 may include a first connection wiring 3162and a second connection wiring 3164.

The first connection wiring 3162 and the second connection wiring 3164are disposed on the first insulating layer 3152 but may be provided sothat they are spaced apart from each other, and thus, are electricallyseparated from each other. In addition, the first connection wiring 3162and the second connection wiring 3164 serve to electrically connect allof the semiconductor structure layers 3120 to one another and connectthe semiconductor structure layers 3120 with one another in parallel.That is, the first connection wiring 3162 is connected with all of thefirst pads 3142 exposed by the opening 3152 a of the first insulatinglayer 3152 and the second connection wiring 3164 is connected with allof the second pads 3144 exposed by the opening 3152 b of the firstinsulating layer 3152, which connect all of the semiconductor structurelayers 3120 with one another in parallel.

In this case, the wiring form of the first connection wiring 3162 andthe second connection wiring 3164 shown in FIG. 12 is shown in one formaccording to another exemplary embodiment of the present invention andmay vary in another form if necessary. That is, the first connectionwiring 3162 and the second connection wiring 3164 may be provided in anypattern form in which the semiconductor structure layers 3120 areconnected with one another in parallel. In addition, the firstconnection wiring 3162 and the second connection wiring 3164 may vary ina pattern form in which the semiconductor structure layers 3120 areconnected with one another in series.

The connection wirings 3160 may be made of conductive metals of at leastone layer or multi-layers including Cr, Au, and Ti, for example, theCr/Au/Ti layers. The Cr/Au/Ti layers may each have a thickness of 10 nm,3000 nm, and 100 nm.

The second insulating layer 3154 of the insulating layers 3150 may bedisposed on the growth substrate 3110 on which the connection wirings3160 are provided.

The second insulating layer 3154 includes openings 3154 a and 3154 bthat open the first connection wiring 3162 and the second connectionwiring 3164, respectively. In this case, the openings 3154 a and 3154 bmay be provided in plural in consideration of the position at which thebumps 3170, which will be described below, are provided as described inFIG. 2.

The second insulating layer 3154 may be formed of an oxide layer, anitride layer, or an organic insulating layer, for example, a siliconnitride layer. The second insulating layer 3154 may have a thickness of2000 to 10000 nm, for example, a thickness of 4800 nm.

The bumps 3170 may include a first bump 3172 and a second bump 3174.

The first bump 3172 is connected with the first connection wiring 3162exposed by the opening 3154 a of the second insulating layer 3154 andthus, may be disposed on the certain region of the second insulatinglayer 3154.

The second bump 3174 is connected with the second connection wiring 3164exposed by the opening 3154 b of the second insulating layer 3154 andthus, may be disposed on the certain region of the second insulatinglayer 3154. The second bump 3174 may be electrically insulated from thefirst bump 3172. In this case, the first bump 3172 and the second bump3174 may be spaced apart from each other. If the light emitting diodepackage 3100 including the first bump 3172 and the second bump 3174 ismounted on the another substrate, the first bump 3172 and the secondbump 3174 need to be sufficiently spaced apart from each other so as notto be short-circuited to each other due to the spreading of theconductive adhesive material. In this case, the conductive adhesivematerial may include at least one of Cr, Ni, Ti, Au, and Sn.

As shown in FIG. 12 and FIG. 13, the first bump 3172 and the second bump3174 are disposed on the second insulating layer 3154. Therefore, thefirst bump 3172 and the second bump 3174 may have the same height.

The bumps 3170 may be made of the conductive materials, for example, theCr/Au/Ti layers. Wherein the Cr/Au/Ti layers may be each provided tohave a thickness of 300 nm, 10000 nm, and 100 nm.

The third insulating layer 3156 of the insulating layers 3150 may bedisposed on the growth substrate 3110 on which the bumps 3170 areprovided.

The third insulating layer 3156 includes the openings 3156 a and 3156 bthat open the first bump 3172 and the second bump 3174, respectively. Inthis case, as shown in FIG. 11 to FIG. 13, the openings 3156 a and 3156b may expose a certain position of each of the first bump 3172 and thesecond bump 3174.

The third insulating layer 3156 may be made of the oxide layer, thenitride layer, or the organic insulating layer. The third insulatinglayer 3156 may have a thickness of 1000 to 5000 nm, for example, athickness of 3000 nm.

Meanwhile, the light emitting diode package 3100 according to anotherexemplary embodiment of the present invention may include a lateralinclination 3112 at which the side of the growth substrate 3110 isinclined. The lateral inclination 3112 may have a certain thickness froma surface of the growth substrate 3110 on which the semiconductorstructure layer 3120 is provided.

In this case, the third insulating layer 3156 may cover the top of thesurface of the growth substrate 3110 and the top of the surface of thelateral inclination 3112 of the growth substrate 3110.

The third insulating layer 3156 covers the top of the surface of thelateral inclination 3112 of the growth substrate 3110 and thus, mayserve to reduce the conductive adhesive material contacting the side ofthe semiconductor structure layer 3120, in particular, the side of thefirst type semiconductor layer 3122 due to the creeping of theconductive adhesive material in a lateral direction of the growthsubstrate when the light emitting diode package 3100 including thecontact parts 3180, which will be described below, is mounted on anothersubstrate.

The contact parts 3180 may include a first contact part 3182 and asecond contact part 3184.

The first contact part 3182 is connected with the first bump 3172exposed by the opening 3156 a of the third insulating layer 3156 andthus, may be disposed on the certain region of the third insulatinglayer 3156.

The second contact part 3184 is connected with the second bump 3174exposed by the opening 3156 b of the third insulating layer 3156 andthus, may be disposed on the certain region of the third insulatinglayer 3156 and may be provided so that the second contact part 3184 iselectrically insulated from the first bump 3172. In this case, the firstcontact part 3182 and the second contact part 3184 may be spaced apartfrom each other, and may each be provided in the same form as the firstbump 3172 and the second bump 3174.

As shown in FIG. 2 and FIG. 3, the first contact part 3182 and thesecond contact part 3184 are disposed on the third insulating layer3156. Therefore, the first contact part 3182 and the second contact part3184 may have the same height.

The contact parts 3180 may be made of the conductive material, forexample, the Ni/Au layers, wherein the Ni/Au layers may each have athickness of 5 μm and 0.25 μm.

FIG. 14 is a plan view showing a light emitting diode package accordingto another exemplary embodiment of the present invention.

Referring to FIG. 14, a light emitting diode package 3200 according toanother exemplary embodiment of the present invention includes aplurality of light emitting packages 3100, which were described withreference to FIG. 11 to FIG. 13, are connected with one another inseries.

That is, the light emitting diode package 3200 may be provided so thatthree light emitting diode packages 3100 are connected with one anotherin series as shown in FIG. 14. The three light emitting diode packages3100 are connected with one another in series by including first bumps3172′ and second bumps 3174′ that are modified to connect the first bump3172 and the second bump 3174 with each other.

In this case, the substrates 3110 may be connected with one another.

FIG. 15 is a plan view showing a light emitting diode package accordingto another exemplary embodiment of the present invention.

Referring to FIG. 15, a light emitting diode package 3300 according toanother exemplary embodiment of the present invention may be provided sothat the plurality of light emitting diodes 3200 according to anotherexemplary embodiment of the present invention, which was described withreference to FIG. 14, are connected with one another in parallel, inother words, the plurality of serial connection arrays including theplurality of light emitting diode packages 3100 according to anotherexemplary embodiment of the present invention are connected with oneanother in parallel.

That is, the light emitting diode package 3300 may include two serialconnection arrays in which the three light emitting diode packages 3100are connected with one another in series as shown in FIG. 15 and may beprovided so that the serial connection arrays are connected with eachother in parallel, wherein the three light emitting diode packages 3100including first bumps 3172′ and second bumps 3174′ that are modified toconnect the first bump 3172 and the second bump 3174 with each other areconnected with one another in series. Further, the light emitting diodepackage 3300 may be provide in a form in which the two serial connectionarrays including the first contact part 3182′ disposed on the firstbumps 3172 or the first bumps 3172′ of the two serial connection arraysand modified to connect with the first bumps 3172 or the first bumps3172′ of the two serial connection array with each other and a secondcontact part 3184′ disposed on the second bumps 3174 or the second bumps3174′ of the two serial connection arrays and modified to connect thesecond bumps 3174 or the second bumps 3174′ of the two serial connectionarrays with each other are connected with each other in parallel.

That is, the light emitting diode packages 3200 and 3300 described withreference to FIG. 14 and FIG. 15 include the plurality of light emittingdiode packages 3100, but various forms of the light emitting diodepackages may be formed by connecting the bumps 3170 or the contact parts3180 with one another in series or in parallel.

FIG. 16 is a plan view showing a light emitting diode package accordingto another exemplary embodiment of the present invention, and FIG. 17 isa circuit diagram of the light emitting diode package shown in FIG. 16.

Referring to FIG. 16 and FIG. 17, a light emitting diode package 3400according to another exemplary embodiment of the present inventionincludes the plurality of light emitting diode packages 3100 accordingto another exemplary embodiment of the present invention, which weredescribed with reference to FIG. 11 to FIG. 13, are connected with oneanother in series, but are arranged in an n×n type and then, areconnected with one another in series.

As shown in FIG. 16, the light emitting diode package 3400 may beprovided so that the sixteen light emitting diode packages 3100 areconnected with one another in series, that is, in a form in which fourcolumns each including the four light emitting diode packages 3100 arearranged.

That is, the light emitting diode package 3400 may include the firstcontact part 3182 that is disposed on the first bump 3172 of a firstlight emitting diode package 3100 of a first column and the secondcontact part 3184 that is disposed on the second bump 3174 of a finallight emitting diode package 3100 of a final column, wherein the lightemitting diode packages 3100 within each column may include the firstbumps 3172′ and the second bumps 3174′ modified so that the first bumps3172′ and the second bumps 3174′ of the adjacent light emitting diodepackages 3100 are connected with one another in series and the finallight emitting diode package 3100 of any one column or the first lightemitting diode package 3100 of any one column may include the firstbumps 3172′ and the second bumps 3174′ modified so that the first bump3172 and the second bump 3174 of the light emitting diode packages 3100of the lower column or the upper column are connected with each other soas to connect the light emitting diode packages 3100 of the bottomcolumn or the top column in series.

FIG. 18 is a plan view showing a light emitting diode package accordingto another exemplary embodiment of the present invention, and FIG. 19 isa circuit diagram of the light emitting diode shown in FIG. 18.

Referring to FIG. 18 and FIG. 19, a light emitting diode package 3500according to another exemplary embodiment of the present inventionincludes the plurality of light emitting packages 3100 according toanother exemplary embodiment of the present invention, which weredescribed with reference to FIG. 11 to FIG. 13, connected with oneanother and may thus be arranged in an n×n type but are connected withone another in parallel, for example, a partially parallel connection soas to use an AC power supply.

The light emitting diode package 3500 according to another exemplaryembodiment of the present invention may be provided so that ⅔, that thenine light emitting diode packages 3100 among all of the light emittingdiode packages emit light at all time when the AC power is appliedthrough the first contact part 3182 and the second contact part 3184 ifthe light emitting diode package 3100 according to another exemplaryembodiment of the present invention described with reference to FIG. 11to FIG. 13 is provided in a 4×4 type.

That is, the light emitting diode package 3500 includes the firstcontact part 3182 connecting the second bump 3174 of the first lightemitting diode package 3100 of the first column with the first bump 3172of the first light emitting diode package 3100 of the second column andthe second contact part 3184 connecting the second bump 3174 of thefinal light emitting diode package 3100 of the third column with thefirst bump 3172 of the final light emitting diode package 3100 of thefourth column.

Further, the light emitting diode package 3500 is connected with thefirst contact part 3182 and may include a first serial connection partDC1 connecting the first to third light emitting diode packages 3100 ofthe first column with one another in series.

The light emitting diode package 3500 is connected with the firstcontact part 3182 and may include a second serial connection part DC2connecting the first light emitting diode packages 3100 of the second tofourth columns with one another in series.

The light emitting diode package 3500 is connected with the secondcontact part 3184 and may include a third serial connection part DC3connecting the final light emitting diode packages 3100 of the first tothird columns with one another in series.

The light emitting diode package 3500 is connected with the secondcontact part 3184 and may include a fourth serial connection part DC4connecting the second to final light emitting diode packages 3100 of thefourth column with one another in series.

The light emitting diode package 3500 may include a fifth serialconnection part DC5 connecting the third light emitting diode package3100 of the second column, the third light emitting diode package 3100of the third column, the second light emitting diode package 3100 of thesecond column, and the second light emitting diode package 3100 of thethird column with one another in series.

As a result, in the light emitting diode package 3500, when the firstserial connection part DC1 and the third serial connection part DC3 arereversely connected with each other, the second serial connection partDC2 and the fourth serial connection part DC4 are reversely connectedwith each other, the fifth serial connection part DC5 is connectedbetween the first serial connection part DC1 and the third serialconnection part DC3 and between the second serial connection part DC2and the fourth serial connection part DC4 and thus, the AC power supplyis connected between the first contact part 3182 and the second contactpart 3184, the second, third, and fifth serial connection parts DC2,DC3, and DC5 may be light-emitted in any one half wave and the first,fourth, and fifth serial connection parts DC1, DC4, and DC5 may belight-emitted in the other one half wave.

FIG. 20 to FIG. 27 are cross-sectional views showing a method ofmanufacturing a light emitting diode package according to an exemplaryembodiment of the present invention.

Referring to FIG. 20, in a method of manufacturing a light emittingdiode package according to an exemplary embodiment of the presentinvention, a substrate 1110 is first prepared.

In this case, the substrate 1110 may be a growth substrate. The growthsubstrate may be a sapphire substrate, a silicon carbide substrate, asilicon substrate, or the like. For example, the growth substrate may bea sapphire substrate. In this case, the other surface of the substrate1110 may be a substrate on which the patterns or ruggedness such as amoth eye pattern (not shown), blast marks (not shown), or the like, arepreviously formed so as to increase the light emission efficiency.

Then, the plurality of semiconductor layers including the first typesemiconductor layer 1122, the active layer 1124, and the second typesemiconductor layer 1126 may be formed on the substrate 1110. In thiscase, a process of forming the buffer layer (not shown) between thesubstrate 1110 and the first type semiconductor layer 1122, the blockinglayer (not shown) between the active layer 1124 and the second typesemiconductor layer 1126, and the high-concentration doped second typesemiconductor layer (not shown) on the second type semiconductor layer1126 may further be performed.

The semiconductor layers may also be formed by the epitaxial growth andmay be formed on the substrate 1110 by various forming methods, such aschemical vapor deposition, physical vapor deposition, or the like.

Referring to FIG. 21, the semiconductor structure layer 1120 includingthe first type semiconductor layer 1122, the active layer 1124, and thesecond type semiconductor layer 1126 is formed by etching thesemiconductor layers formed on the substrate 1110 and at least one lightemitting diode including the contact pads 1130 including the firstcontact pad 1132 and the second contact pad 1134 formed on the firsttype semiconductor layer 1122 and the second type semiconductor layer1126, respectively, of the semiconductor structure layer 1120 and thebumps 1140 including the first bump 1142 and the second bump 1144 formedon the first contact pad 1132 and the second contact pad 1134,respectively, is formed.

That is, as described with reference to FIG. 20, after the semiconductorlayers are formed on the substrate 1111, a mesa etching process exposinga portion of the first type semiconductor layer 1122 by etching aportion of the semiconductor layers, that is, at least second typesemiconductor layer 1126 and the active layer 1124 and a process ofsegmenting and etching a semiconductor layer including the second typesemiconductor layer 1126, the active layer 1124, and the first typesemiconductor layer 1122 are performed to form the plurality ofsemiconductor structure layer 1120 on the substrate 1110. Further, thelight emitting diode is manufactured by forming the contact pads 1130and the bumps 1140 on the semiconductor structure layers 1120,respectively.

In this case, the bumps 1140 may be formed in various forms. That is,the bumps 1140 may be formed in a stud bump and may also be formed bythe evaporation and etching processes using a mask, or the like, or maybe formed using a plating method.

Meanwhile, the method of manufacturing a light emitting diode accordingto the exemplary embodiment of the present invention shows that thefirst bump 1142 and the second bump 1144 are formed on the first contactpad 1132 and the second contact pad 1134, respectively, in forming thebumps 1140 and is mainly described with reference thereto. As describedwith reference to FIG. 4 and FIG. 5, the plurality of first bumps 1142and the plurality of second bumps 1144 may be formed on the firstcontact pad 1132 and the second contact pad 1134, respectively.

In this case, the method of manufacturing a light emitting diodedescribed with reference to FIG. 20 and FIG. 21 is only an example andmay also be manufactured by other methods in addition to theabove-mentioned method, that is, the known various methods.

Describing with reference to FIG. 22, an insulating material layer 1152is formed on the substrate 1110 on which the light emitting diode isformed. In this case, the insulating material layer 1152 may be formedby forming the insulating material on the substrate 1110. The insulatingmaterial layer 1152 may be made of an inorganic material such as asilicon-based oxide, silicon-based nitride, or the like, or may be madeof material organic material such as resin, or the like. The insulatingmaterial layer 1152 may be formed by using a deposition method such asusing the chemical vapor deposition, the physical vapor deposition, orthe like, and a coating method such as spin coating, or the like.

In this case, the insulating material layer 1152 is formed to completelycover at least the semiconductor structure layer 1120, for example, thesurface of the substrate 1110, that is, completely cover thesemiconductor structure layer 1120 and the bumps 1140, as shown in FIG.22.

Referring to FIG. 23, the insulating material layer 1152 is planarizedby a chemical mechanical polishing (CMP) process so as to expose aportion of the bumps 1140 to form the protective layer 1150. In thiscase, the insulating material layer 1152 is planarized by variousmethods, such as the CMP process, a lapping, or the like, to form theprotective layer 1150 from which the bumps 1140 are exposed.

In addition, when the insulating material layer 1152 is formed, thethickness of the insulating material layer 1152 is sufficientlycontrolled and formed to cover the bumps 1140 and then, the protectivelayer 1150 from which the bumps 1140 are exposed may be formed byperforming the etching process exposing the bumps 1140 using the maskwithout the planarization process.

Referring to FIG. 24, the bump pads 1160 may be formed on the protectivelayer 1150 from which the bumps 1140 are exposed. In this case, althoughnot shown in FIG. 24, a process of forming the current spreading layers1190 may be performed prior to forming the bump pads 1160.

The bump pads 1160 may be formed by depositing through the chemicalvapor deposition, the physical vapor deposition, or the like, andpatterning, and may be formed by using the plating method, or the like.In this case, although forming the bump pads 116 according to the methodof manufacturing a light emitting diode according to the exemplaryembodiment of the present invention is described as forming the bumppads 1160 described with reference to FIG. 1, the bump pads having arelatively large size similar to the bump pads 1160 described withreference to FIG. 2 and FIG. 3 may be formed.

In this case, the method of manufacturing a light emitting diodeaccording to the exemplary embodiment of the present invention isdescribed based on the form in which the single light emitting diodepackage 1100 as described with reference to FIG. 20 to FIG. 27 includesthe single light emitting diode formed on the substrate 1110 but theplurality of light emitting diodes may be formed on the substrate 1110and the light emitting diodes may be manufactured in a form in whichthey are arrayed in series or in parallel.

That is, the method of manufacturing a light emitting diode according tothe exemplary embodiment of the present invention by forming the firstbump pad 1162 and the second bump pad 1164 on the first bump 1142 andthe second bump 1144 on the substrate 1110 and then, segmenting thesubstrate 1110 in the following processes is shown and described asshown in FIG. 24. However, the light emitting diode package ismanufactured by forming the plurality of light emitting diodes on thesubstrate 1110 and connecting the first bump 1142 and the second bump1144 of the adjacent light emitting diodes with each other by the singlebump pad or the current spreading layer to connect the two lightemitting diodes in series or in parallel. Thereafter, the light emittingdiode package in which the plurality of light emitting diodes arearrayed on the single substrate 1110 may be manufactured by segmentingthe substrate 1110 so as to dispose the plurality of light emittingdiodes on the single substrate 1110 during the process of segmenting thesubstrate described with reference to FIG. 27.

Referring to FIG. 25, after the bump pads 1160 is formed on the surfaceof the substrate 1110, a V groove 1116 segmenting the substrate 1110 isformed in a certain region of the other surface 1112 of the substrate1110 by using laser or blast and the corner of the other surface 1112 ofthe substrate 1110 may be provided with the lateral inclination 1114.

In this case, the blast may be a sand blast. When the other surface 1112of the substrate 1110 is not previously provided with the patterns orthe ruggedness such as the above-mentioned moth eye pattern (not shown),the blast marks (not shown), or the like, in order to increase the lightemission efficiency, the patterns or ruggedness such as the moth eyepattern (not shown), the blast marks (not shown), or the like, may beformed by using the laser or the blast during the process of forming theV groove 1116 to increase the light emission efficiency. In this case,when the light emitting diode package manufactured by the method ofmanufacturing a light emitting diode according to the exemplaryembodiment of the present invention does not need to include the lateralinclination 1114, the present process may be omitted.

Referring to FIG. 26, the phosphor layer 1170 is formed on the othersurface 1112 of the substrate 1110, for example, the other surface 1112of the substrate 1110 and on the lateral inclination 1114 and the Vgroove 1116. The phosphor layer 1170 may be formed by conformal coating.In this case, when the light emitting diode package manufactured by themethod of manufacturing a light emitting diode according to theexemplary embodiment of the present invention does not need to includethe phosphor layer 1170, the present process may be omitted.

Referring to FIG. 27, the light emitting diode package 1100 ismanufactured by performing the process of segmenting the substrate 1110.

In this case, when the other surface of the substrate 1110 is formedwith the V groove 1116, the substrate 1110 is segmented based on the Vgroove 1116 and the V groove 1116 becomes the lateral inclination 1114.

Meanwhile, the internal processing laser beam is irradiated to theinside of the substrate 1110 along a virtual segmentation line forsegmenting the substrate 1110 during the process of segmenting thesubstrate 1110, thereby facilitating the segmentation of the substrate1110.

Meanwhile, when the other surface of the substrate 1110 is not providedwith the V groove 1116, the light emitting diode package 1100 may bemanufactured by segmenting the substrate 1110 using a general scribingprocess.

FIG. 28 to FIG. 38 are cross-sectional views showing a method ofmanufacturing a light emitting diode package according to an exemplaryembodiment of the present invention.

Referring to FIG. 28, in a method of manufacturing a light emittingdiode package according to another exemplary embodiment of the presentinvention, a substrate 3110 is first prepared.

In this case, the method of manufacturing a light emitting diode packageaccording to another exemplary embodiment of the present invention isdescribed based on a method of manufacturing the light emitting diode3100 according to another exemplary embodiment of the present inventiondescribed with reference to FIG. 11 to FIG. 13, but the light emittingdiode package 3200 according to another exemplary embodiment of thepresent invention described with reference to FIG. 14, the lightemitting diode package 3300 according to another exemplary embodiment ofthe present invention described with reference to FIG. 15, the method ofmanufacturing the light emitting diode package 3400 according to anotherexemplary embodiment of the present invention described with referenceto FIG. 16 and FIG. 17, and the method of manufacturing a light emittingdiode 3500 according to another exemplary embodiment of the presentinvention described with reference to FIG. 18 and FIG. 19 may beapplied.

The growth substrate 3110 may be defined by a diode region DR and avertical region (VR) as shown in FIG. 38. In this case, the diode regionDR may be a region in which the light emitting diode package 3100 isformed and the vertical region VR may be a region for segmenting theplurality of light emitting diode package 3100 formed on the growthsubstrate 3110.

Meanwhile, the diode region DR may include structure regions SRs and gapregions GRs.

The first type semiconductor layer 3122, the active layer 3124, and thesecond type semiconductor layer 3126 are sequentially formed on thesurface of the growth substrate 3110 on which the regions are defined.

In this case, the first type semiconductor layer 3122, the active layer3124, and the second type semiconductor layer 3126 may be consecutivelyformed by the epitaxial growth.

Referring to FIG. 29, the semiconductor structure layer 3120 includingthe first type semiconductor layer 3122, the active layer 3124, and thesecond type semiconductor layer 3126 is formed within the structureregions SRs by performing the mesa etching on the active layer 3124 andthe second type semiconductor layer 3126 of the growth substrate 3110.

Meanwhile, the ohmic contact layer 3130 may be formed on thesemiconductor structure layer 3120. In this case, the ohmic contactlayer 3130 may be formed by the separate process after performing themesa etching forming the semiconductor structure layer 3120.

In addition, the ohmic contact layer 3130 may also be formed by formingan ohmic contact formation layer on the second type semiconductor layer3126 prior to the process of etching mesa, that is, prior to forming thesemiconductor structure layer 3120 through the mesa etching process,first etching the ohmic contact formation layer, and then, forming theprocess of forming the semiconductor structure layer 3120. In this case,the ohmic contact layer 3130 may be formed by using a mask pattern forperforming the mesa etching process.

Referring to FIG. 30, the plurality of first pads 3142 and second pads3144 are each formed on the growth substrate 3110 on which the pluralityof semiconductor structure layers 3120 are formed.

In this case, the first pads 3142 are formed on the certain regions onthe gap region GR within the diode region DR. The first pads 3142 aredisposed on the gap regions GR and are disposed on the certain regionsof the first type semiconductor layer 3122 through mesa etching to formthe semiconductor structure layer 3120.

The second pads 3144 are disposed on the ohmic contact layers 3130.

In this case, the first pads 3142 and the second pads 3144 may also beformed by performing the patterning process after forming the padforming material layer on the growth substrate 3110 on which thesemiconductor structure layer 3120 is formed and may be formed by firstforming the mask pattern including the openings corresponding to thefirst pads 3142 and the second pads 3144 on the growth substrate 3110 onwhich the semiconductor structure layer 3120 is formed, forming the padforming material layer, and then, lifting off the mask pattern.

Referring to FIG. 31, a first insulating layer 3152 is formed on thegrowth substrate 3110 on which the first pads 3142 and the second pads3144 are formed.

In this case, the first insulating layer 3152 includes the openings 3152a and 3152 b that partially open regions of the first pads 3142 and thesecond pads 3144, respectively.

Referring to FIG. 32, the plurality of first connection wirings 3162 andsecond connection wirings 3164 are each formed on the growth substrate3110 on which the first insulating layer 3152 is formed.

In this case, the first connection wiring 3162 is formed by electricallyconnecting the first pads 3142 exposed by the openings 3152 a of thefirst insulating layer 3152 to one another and the second connectionwiring 3164 may be formed to electrically connect the second pads 3144exposed by the openings 3152 b of the first insulating layer 3152 to oneanother.

In this case, the first connection wiring 3162 and the second connectionwiring 3164 may each be formed within the diode region DR as describedwith reference to FIG. 12 or 13.

In this case, the first connection wirings 3162 and the secondconnection wirings 3164 may be formed by performing the patterningprocess after forming the connection wiring forming material layer onthe growth substrate 3110 on which the first insulating layer 3152 isformed and may be formed by first forming a mask pattern including theopenings corresponding to the first connection wirings 3162 and thesecond connection wirings 3164 on the growth substrate 3110 on which thefirst insulating layer 3152 is formed, the connection wiring formingmaterial layer, and then, lifting-off the mask pattern.

Referring to FIG. 33, the second insulating layer 3154 is formed on thegrowth substrate 3110 on the first connection wiring 3162 and the secondconnection wiring 3164 are formed.

In this case, the second insulating layer 3154 includes the openings3154 a and 3154 b that partially open regions of the first connectionwiring 3162 and the second connection wiring 3164, respectively.

Referring to FIG. 34, the plurality of first bumps 3172 and theplurality of second bumps 3174 are each formed on the growth substrate3110 on which the second insulating layer 3154 is formed.

In this case, the first bump 3172 may be formed by electrically connectto the first connection wirings 3162 exposed by the openings 3154 a ofthe second insulating layer 3154 and the second bump 3174 may be formedto electrically connect to the second connection wiring 3164 exposed bythe openings 3154 b of the second insulating layer 3154.

In this case, the first bump 3172 and the second bump 3174 may be formedby performing the patterning process after forming the bump formingmaterial layer on the growth substrate 3110 on which the secondinsulating layer 3154 is formed and may be formed by first forming theopenings corresponding to the first bump 3172 and the second bump 3174on the growth substrate 3110 on which the second insulating layer 3154is formed, the bump forming material layer, and then, lifting-off themask pattern.

In this case, the light emitting diode packages 3200, 3300, 3400, and3500 described with reference to FIG. 14 to FIG. 19 may also be formedby forming the first bump 3172′ and the second bump 3174′ described withreference to FIG. 14 to FIG. 19, that is, the first bump 3172′ and thesecond bump 3174′ modified to each connect between the first bump 3172and the second bump 3174 of the adjacent light emitting diode packages3100 or between the first bump 3172 and the second bump 3174 of thelight emitting diode package 3100 on the lower column or the uppercolumn.

Referring to FIG. 35, the first type semiconductor layer 3122, the firstinsulating layer 3152, the second insulating layer 3154, and the growthsubstrate 3110 are simultaneously etched so that each light emittingdiode packages 3100, 3200, 3300, 3400, and 3500 are separated in thecertain region of the growth substrate 3110, for example, the verticalregions VRs of the growth substrate 3110, thereby performing V cutetching forming V cuts in the vertical regions VRs.

The V cut etching forms the lateral inclinations 3112 at the edges ofthe growth substrate 3110 of the light emitting diode packages 3100,3200, 3300, 3400, and 3500. In this case, the V cuts may be formed byforming a V-shaped groove by a certain depth from the surface of thegrowth substrate 3110, that is, a certain thickness therefrom.

In this case, the method of manufacturing a light emitting diode package3100 performing only the V cut etching that simultaneously etches thefirst type semiconductor layer 3122, the first insulating layer 3152,the second insulating layer 3154, and the growth substrate 3110 all thevertical regions VRs will be described with reference to FIG. 35, butthe segmentation etching is performed in any vertical regions VRs (thatis, shown by a partition region PR in FIG. 39 to FIG. 41) of thevertical regions VRs and the V cut etching is performed in the remainingvertical regions VRs, thereby forming the light emitting diode packages3200, 3300, 3400, and 3500 including the plurality of light emittingdiode packages 3100 (which will be described in detail with reference toFIG. 39 to FIG. 41). In this case, the vertical region VR in which thesegmentation etching is performed may be the vertical region VR which isdisposed in the light emitting diode packages 3200, 3300, 3400, and3500, wherein the segmentation etching may be the etching that etchesand segments at least the first type semiconductor layer 3122.

Referring to FIG. 36, the third insulating layer 3156 is formed on thegrowth substrate 3110 on which the first bumps 3172 and the second bumps3174 are formed.

The third insulating layer 3156 includes the openings 3156 a and 3156 bthat partially open the regions of the first bump 3172 and the secondbump 3174, respectively.

In this case, the third insulating layer 3156 may be formed to cover thesurface of the growth substrate 3110 exposed due to the segmentationetching or the V-shaped grooves of the growth substrate exposed by the Vcut etching as well as the sides of the first insulating layer 3152 andthe second insulating layer 3154, or the like.

Referring to FIG. 37, the first contact part 3182 and the second contactpart 3184 are formed on the growth substrate 3110 on which the thirdinsulating layer 3156 is formed.

In this case, the first contact part 3182 is formed to electricallyconnect to the first bump 3172 exposed by the opening 3156 a of thethird insulating layer 3156 and the second contact part 3184 may beformed to electrically connect to the second bump 3174 exposed by theopening 3156 b of the third insulating layer 3156.

In this case, the first contact part 3182 and the second contact part3184 may be formed by performing the patterning process after formingthe contact forming material layer on the growth substrate 3110 on whichthe third insulating layer 3156 is formed and may be formed by firstforming the mask pattern including the openings corresponding to thefirst contact part 3182 and the second contact part 3184 on the growthsubstrate 3110 on which the third insulating layer 3156 is formed,forming the contact material layer, and then, lifting-off the maskpattern.

Referring to FIG. 38, the light emitting diode package 3100 according toanother exemplary embodiment of the present invention may bemanufactured by segmenting the growth substrate 3110 by using thevertical region VR of the growth substrate 3110 on which the firstcontact part 3182 and the second contact part 3184 are formed, inparticular, the vertical regions VRs in which the V-shaped groove isformed on the growth substrate 3110 by the V cut etching.

In this case, a portion of the V-shaped groove formed by the V cutetching forms the lateral inclinations 3112 at the edges of the growthsubstrate 3110.

Meanwhile, the method of forming a light emitting diode package 3100segmenting the growth substrate 3110 forming the first contact part 3182and the second contact part 3184 is described with reference to FIG. 38and the light emitting diode package in which the first bump 3172 andthe second bump 3174 are exposed by forming the first bump 3172 and thesecond bump 3174 on the growth substrate 3110, performing the V cutetching, and directly performing the segmentation as described withreference to FIG. 35 may be formed.

FIG. 39 to FIG. 41 are cross-sectional views showing a method ofmanufacturing a light emitting diode package according to an exemplaryembodiment of the present invention. In this case, FIG. 39 to FIG. 41show a cross section of a half of the light emitting diode package 3200according to another exemplary embodiment of the present inventiondescribed with reference to FIG. 14, that is, a cross section takenalong line F-F′ shown in FIG. 14.

Referring to FIG. 39, in a method of manufacturing a light emittingdiode package according to another exemplary embodiment of the presentinvention, the growth substrate 3110 is first prepared.

In this case, the method of manufacturing a light emitting diode packageaccording to another exemplary embodiment of the present invention isdescribed based on a method of manufacturing the light emitting diode3200 according to another exemplary embodiment of the present inventiondescribed with reference to FIG. 14, but the light emitting diodepackage 3300 according to another exemplary embodiment of the presentinvention described with reference to FIG. 15, the method ofmanufacturing the light emitting diode package 3400 according to anotherexemplary embodiment of the present invention described with referenceto FIG. 16 and FIG. 17, and the method of manufacturing a light emittingdiode 3500 according to another exemplary embodiment of the presentinvention described with reference to FIG. 18 and FIG. 19 may beapplied. That is, the method of manufacturing a light emitting diodepackage may be applied to the exemplary embodiments in which theplurality of light emitting diode package 3100 according to the lightemitting diode package 3100 according to the light emitting diode areconnected to one another.

The growth substrate 3110 may be defined by the diode region DR, thepartition region (PR), and the vertical region (VR) as shown in FIG. 39.In this case, the diode region DR may be a region in which the lightemitting diode package 3100 is formed, the partition region PR, which isa region for dividing the light emitting diode packages 3100 of thelight emitting diode packages 3200, 3300, 3400, and 3500, may be aregion in which the segmentation etching is performed, and the verticalregion VR, which is a region for segmenting the plurality of lightemitting diode packages 3200, 3300, 3400, and 3500 including the lightemitting diode packages 3100, may be a region in which the V cut etchingis performed.

Meanwhile, the diode region DR may include structure regions SRs and gapregions GRs.

The semiconductor structure layer 3120, the ohmic contact layer 3130,the first pad 3142, the second pad 3144, the first insulating layer3152, the first connection wiring 3162, and the second connection wiring3164 may be formed on the surface of the growth substrate 3110 on whichthe regions are defined, that is, the surface of the growth substrate3110 as described with reference to FIG. 28 to FIG. 33.

Thereafter, the segmentation etching segmenting the light emitting diodepackages 3100 within the light emitting diode packages 3200, 3300, 3400,3500 is performed. That is, as shown in FIG. 39, the light emittingdiode package 3200 including the three light emitting diode package 3100as shown in FIG. 39 performs the segmentation etching segmenting thefirst insulating layer 3152 and the first type semiconductor layer 3122so that the light emitting diode packages 3100 of the light emittingdiode package 3200 are separated from each other in the partitionregions PRs, in particular, the first type semiconductor layers 3122 areseparated from each other.

In this case, the segmentation etching may be etched enough to exposethe surface of the growth substrate 3110 and may etch the growthsubstrate 3110 to the certain depth.

Further, the exemplary embodiment of the present invention describesthat the first insulating layer 3152 is formed and then, thesegmentation etching is performed, but after the semiconductor structurelayer 3120 is formed, the segmentation etching may be performed prior tothe first bump 3172 and the second bump 3174, which will be describedbelow.

Referring to FIG. 40, the second insulating layer 3154 is formed on thegrowth substrate 3110 on which the first insulating layer 3152 is formedas described with reference to FIG. 33.

Then, the first bump 3172 and the second bump 3174 are formed on thesecond insulating layer 3154 as described with reference to FIG. 34 andat the same time, the first bump 3172′ and the second bump 3174′ areformed thereon.

Thereafter, as described with reference to FIG. 35, the V cut etchingthat etches the first type semiconductor layer 3122, the firstinsulating layer 3152, the second insulating layer 3154, and the growthsubstrate 3110 of the vertical region VR may be performed so that thelight emitting diode packages 3200, 3300, 3400, and 3500 are separatedfrom one another.

The V cut etching may form the V cuts that can separate the lightemitting diode packages 3200, 3300, 3400, and 3500 into the individualpackage and may be performed in the segmentation region VR. In thiscase, the V cuts may be formed by forming a V-shaped groove up to acertain depth from the surface of the growth substrate 3110, that is, acertain thickness therefrom.

As shown in FIG. 40, when the light emitting diode package 3200described with reference to FIG. 14 is manufactured, the V cut etchingis performed in the segmentation regions VRs between the light emittingdiode packages 3200 to form the V cuts in the growth substrate 3110 andthe first type semiconductor layer 3122 and the first insulating layer3152 are etched in the partition regions PRs within the light emittingdiode packages 3200, that is, the two partition regions PRs providedamong the three light emitting diode packages 3100 of the light emittingdiode package 3200 and the segmentation etching exposing the surface ofthe growth substrate 3110 may be performed.

Referring to FIG. 41, the third insulating layer 3156 is formed on thegrowth substrate 3110 on which the V cuts are formed as described withreference to FIG. 36.

Therefore, the first contact part 3182 and the second contact part 3184are formed on the third insulating layer 3156 as described above withreference to FIG. 19.

Further, the light emitting diode packages 3200, 3300, 3400, and 3500may be manufactured by forming the first contact part 3182 and thesecond contact part 3184 and then, segmenting the growth substrate 3110by using the vertical regions VRs in which the V-shaped groove is formedby the V cut etching as described with reference to FIG. 38.

As set forth above, the exemplary embodiments of the present inventioncan provide the light emitting diode package of the wafer level and themethod of manufacturing the same by providing the process of packaginglight emitting diode chips while manufacturing the light emitting diodechips.

Further, the exemplary embodiments of the present invention can providethe light emitting diode package and the method of manufacturing thesame capable of reducing the emission of light scattered without beingconverted by the phosphor layer from the side of the light emittingdiode package.

In addition, the exemplary embodiments of the present invention canprovide the large-area light emitting diode package having the largeemission area and the method of manufacturing the same.

Moreover, the exemplary embodiments of the present invention can providethe large-area light emitting diode package having the large emissionarea and the method of manufacturing the same capable of facilitatingthe heat generation and the current spreading.

Also, the exemplary embodiments of the present invention can provide thelight emitting diode package and the method of manufacturing the samecapable of simplifying the process and reducing the defective rate andthe manufacturing costs.

Hereinabove, although the present invention has been described withreference to the exemplary embodiments thereof, the present invention isnot limited thereto. It may be appreciated by those skilled in the artthat modifications and alterations may be made without departing fromthe spirit and the scope of the present invention, which fall within thescope of the present invention.

What is claimed is:
 1. A light emitting diode, comprising: asemiconductor structure comprising a first type semiconductor layer, anactive layer, and a second type semiconductor layer; an ohmic contactlayer disposed on the second type semiconductor layer; a firstinsulating layer disposed on the semiconductor structure and comprisinga plurality of first openings overlapping the first type semiconductorlayer and a plurality of second openings overlapping the ohmic contactlayer; a first connection wiring disposed on the first insulating layer,a first portion of the first connection wiring disposed on the firsttype semiconductor layer and a second portion of the first connectionwiring disposed on the second type semiconductor layer; a secondconnection wiring disposed on the second type semiconductor layer; asecond insulating layer disposed on the first connection wiring and thesecond connection wiring; wherein the first portion of the firstconnection wiring electrically connects to the first type semiconductorlayer through the plurality of first openings; wherein the plurality offirst openings are positioned on an edge of the first type semiconductorlayer along an edge of the first type semiconductor layer; and whereinthe second portion of the first connection wiring surrounds the secondconnection wiring.
 2. The light emitting diode of claim 1, furthercomprising a first pad disposed between the first semiconductor layerand the first connection wiring.
 3. The light emitting diode of claim 2,wherein the light emitting diode comprises an n×m array of thesemiconductor structures disposed on a growth substrate, wherein n is aninteger greater than or equal to 1 and m is an integer greater than 1,and the semiconductor structures are disposed on structure regions andseparated by gap regions exposing the first semiconductor layer.
 4. Thelight emitting diode of claim 3, wherein the semiconductor structuresare rectangular and the first pads are disposed in corner regions ofexposed first semiconductor layer.
 5. A light emitting diode packagecomprising a plurality of light emitting diodes of claim 3, wherein theplurality of light emitting diodes are connected to each other inseries.
 6. The light emitting diode of claim 3, wherein the ohmiccontact layer comprises at least one reflective metal layer configuredto reflect light emitted from the semiconductor structure to the growthsubstrate.
 7. The light emitting diode of claim 3, further comprising alateral inclination at a side of the growth substrate.
 8. The lightemitting diode of claim 7, further comprising: a first bump electricallyconnected to the first connection wiring through a first opening in thesecond insulating layer; and a second bump electrically connected to thesecond connection wiring through a second opening in the secondinsulating layer, wherein the first bump is electrically insulated fromthe second bump.
 9. The light emitting diode of claim 8, furthercomprising a third insulating layer disposed on the first bump and thesecond bump, wherein the third insulating layer comprises a firstopening exposing a portion of the first bump and a second openingexposing a portion of the second bump.
 10. The light emitting diode ofclaim 9, wherein the third insulating layer covers a top of a surface ofthe lateral inclination of the growth substrate.
 11. The light emittingdiode of claim 9, wherein the third insulating layer has a thicknessbetween 1000 nm and 5000 nm and is comprised of material selected fromthe group consisting of an oxide layer, a nitride layer, and an organicinsulating layer.
 12. The light emitting diode of claim 10, furthercomprising a first contact part electrically connected to the first bumpthrough the first opening in the third insulating layer.
 13. The lightemitting diode of claim 12, further comprising a second contact partelectrically connected to the second bump through the second opening inthe third insulating layer.
 14. The light emitting diode of claim 13,wherein the first contact part and the second contact part are spacedapart from each other such that the second contact part is electricallyinsulated from the first bump.
 15. The light emitting diode of claim 14,wherein the first contact part and second contact part are configured tohave a same height from the growth substrate.
 16. The light emittingdiode of claim 1, further comprising a second pad disposed between theohmic contact layer and the second connection wiring.
 17. The lightemitting diode of claim 1, wherein the first insulating layer and thesecond insulating layer have a thickness between 2000 nm and 10000 nmand are comprised of material selected from the group consisting of anoxide layer, a nitride layer, and an organic insulating layer.
 18. Thelight emitting diode of claim 1, wherein the first insulating layer is adistributed Bragg reflector (DBR) layer formed of insulating layershaving different refractive indexes.
 19. A light emitting diode packagecomprising a plurality of light emitting diodes of claim 1, wherein theplurality of light emitting diodes are connected to each other inseries.